matplotlib icon

[tedo.vrbanec at gmail.com]

I am getting this logging.INFO notice:
Could not load matplotlib icon: bad option "foobar": must be aspect, attributes, client, colormapwindows, command, deiconify, focusmodel, forget, frame, geometry, grid, group, iconbitmap, iconify, iconmask, iconname, iconphoto, iconposition, iconwindow, manage, maxsize, minsize, overrideredirect, positionfrom, protocol, resizable, sizefrom, stackorder, state, title, transient, or withdraw
I even set icon, but this notice remains.
There's nothing on web or in matplotlib documentation.
Python 2.7, Debian